When i make calls through nimbuzz, I cannot hear anything on my jabra device. Why?

The Pairing key is 0000
Have you tried to pair with other devices ?
It can support up to 8, connected to two at the same time as well.
Jabra Bluetooth Headsets Wireless Speakers Office Speakerphones

check bluetooth is on in Iphone settings ?

most pairing when asked by the device requires a 00000 passcode
but you need to set the jabra and the iphone up for pairing
here is a link for jabra the iphone should see it when the jabra is set to set up mode..
http://www.jabra.com/support/Jabra-JOURNEY_100-47300000-15

1. • 1. Hold the "Answer/End" button on your Jabra Bluetooth headset down until the LED light on the headset turns solid blue. It is the button that has an image of a telephone on it.
   • 2. Click on the "Settings" icon from the main screen of your iPhone.
     
   • 3. Click on "General" in your iPhone's "Settings" menu.
   • 4. Click on "Bluetooth" to access your iPhone's Bluetooth menu and then click the option to turn on your iPhone's Bluetooth connection. Once your iPhone's Bluetooth is turned on, it will search for available Bluetooth devices.
   • 5. Select your Jabra headset by clicking on the icon that appears on your iPhone's screen.
   • 6. Enter the passkey for your Jabra Bluetooth headset. The default passkey on Jabra headsets is "0000."
   • 7. Click on OK on your iPhone
     

Hold the "Answer/End" button on your Jabra Bluetooth headset down until the LED light on the headset turns solid blue. The location of the button may vary based on which headset you have, but its appearance will be the same; it is the button that has an image of a telephone on it.


Click on the "Settings" icon from the main screen of your iPhone 4 .

Click on "General" in your iPhone's "Settings" menu.


Click on "Bluetooth" to access your iPhone's Bluetooth menu and then click the option to turn on your iPhone's Bluetooth connection. Once your iPhone's Bluetooth is turned on, it will search for available Bluetooth devices.


Select your Jabra headset by clicking on the icon that appears on your iPhone's screen.


Enter the passkey for your Jabra Bluetooth headset. The default passkey on Jabra headsets is "0000."


Click on "OK" on your iPhone 4 to complete the connection to your Jabra headset.

Tips & Warnings



The LED light on your headset must be solid blue to pair to your iPhone. A flashing light indicates your headset is not yet in pairing mode and your iPhone will not be able to connect to the headset.

Having your iPhone 4 Bluetooth turned on will drain your phone battery faster than normal.

To see if the problem is with your bluetooth connection, try sending and recieving files with your bluetooth. If it is successful, then try borrowing 1 jabra device and test it with your phone. The bluetooth connection and the jabra device are the problems I can see since you said it worked once.
Hope this helps! -jayps

I just had this same problem. I solved it by turning the iPhone Bluetooth off and then back on, after which the pairing (with passcode 0000) worked properly and so does the headset.

Cannot get my Jabra BT 250v to work with my Blackberry Curve 8310. Phone indicates I am paired, but there is no audio through earpiece. You can still hear audio through phone. Help.

I have the same problem. The lights are on, it's paired, and my caller can hear me. but I cannot hear the beep from pressing buttons on the jabra, nor can I hear anything from the phone.